Soulbinder is an Overlord class that introduces the Scourge servant. Servants are the Overlord equivalent of a familiar, that he can summon onto the battlefield to attack the heroes. Servants are unique in that the Overlord always has access to the servant card after he has bought it, he does not need to draw it from the deck. The Overlord can also buy various upgrade cards for his Scourge, but these need to be drawn from the deck as normal.